[ViewVC] Diff of: cvs/JSON-XS/XS.xs

Comparing JSON-XS/XS.xs (file contents):
Revision 1.39 by root, Mon Jun 11 03:42:57 2007 UTC vs.
Revision 1.59 by root, Mon Aug 13 16:14:20 2007 UTC

…		…
1	#include "EXTERN.h"	1	#include "EXTERN.h"
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
4		4
5	#include "assert.h"	5	#include <assert.h>
6	#include "string.h"	6	#include <string.h>
7	#include "stdlib.h"	7	#include <stdlib.h>
8	#include "stdio.h"	8	#include <stdio.h>
		9	#include <float.h>
9		10
10	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)	11	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)
11	# define snprintf _snprintf // C compilers have this in stdio.h	12	# define snprintf _snprintf // C compilers have this in stdio.h
12	#endif	13	#endif
13		14
		15	// some old perls do not have this, try to make it work, no
		16	// guarentees, though. if it breaks, you get to keep the pieces.
		17	#ifndef UTF8_MAXBYTES
		18	# define UTF8_MAXBYTES 13
		19	#endif
		20
14	#define F_ASCII 0x00000001UL	21	#define F_ASCII 0x00000001UL
15	#define F_LATIN1 0x00000002UL	22	#define F_LATIN1 0x00000002UL
16	#define F_UTF8 0x00000004UL	23	#define F_UTF8 0x00000004UL
17	#define F_INDENT 0x00000008UL	24	#define F_INDENT 0x00000008UL
18	#define F_CANONICAL 0x00000010UL	25	#define F_CANONICAL 0x00000010UL
19	#define F_SPACE_BEFORE 0x00000020UL	26	#define F_SPACE_BEFORE 0x00000020UL
20	#define F_SPACE_AFTER 0x00000040UL	27	#define F_SPACE_AFTER 0x00000040UL
21	#define F_ALLOW_NONREF 0x00000100UL	28	#define F_ALLOW_NONREF 0x00000100UL
22	#define F_SHRINK 0x00000200UL	29	#define F_SHRINK 0x00000200UL
		30	#define F_ALLOW_BLESSED 0x00000400UL
		31	#define F_CONV_BLESSED 0x00000800UL
23	#define F_MAXDEPTH 0xf8000000UL	32	#define F_MAXDEPTH 0xf8000000UL
24	#define S_MAXDEPTH 27	33	#define S_MAXDEPTH 27
		34	#define F_MAXSIZE 0x01f00000UL
		35	#define S_MAXSIZE 20
		36	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
25		37
26	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))	38	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
27		39	#define DEC_SIZE(flags) (1UL << ((flags & F_MAXSIZE ) >> S_MAXSIZE ))
28	// F_SELFCONVERT? <=> to_json/toJson
29	// F_BLESSED? <=> { $__class__$ => }
30		40
31	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER	41	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER
32	#define F_DEFAULT (9UL << S_MAXDEPTH)	42	#define F_DEFAULT (9UL << S_MAXDEPTH)
33		43
34	#define INIT_SIZE 32 // initial scalar size to be allocated	44	#define INIT_SIZE 32 // initial scalar size to be allocated
48	#endif	58	#endif
49		59
50	#define expect_false(expr) expect ((expr) != 0, 0)	60	#define expect_false(expr) expect ((expr) != 0, 0)
51	#define expect_true(expr) expect ((expr) != 0, 1)	61	#define expect_true(expr) expect ((expr) != 0, 1)
52		62
		63	#ifdef USE_ITHREADS
		64	# define JSON_SLOW 1
		65	# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1))
		66	#else
		67	# define JSON_SLOW 0
		68	# define JSON_STASH json_stash
		69	#endif
		70
53	static HV *json_stash; // JSON::XS::	71	static HV json_stash, json_boolean_stash; // JSON::XS::
		72	static SV json_true, json_false;
		73
		74	typedef struct {
		75	U32 flags;
		76	SV *cb_object;
		77	HV *cb_sk_object;
		78	} JSON;
54		79
55	/////////////////////////////////////////////////////////////////////////////	80	/////////////////////////////////////////////////////////////////////////////
56	// utility functions	81	// utility functions
57		82
58	static UV *	83	inline void
59	SvJSON (SV *sv)
60	{
61	if (!(SvROK (sv) && SvOBJECT (SvRV (sv)) && SvSTASH (SvRV (sv)) == json_stash))
62	croak ("object is not of type JSON::XS");
63
64	return &SvUVX (SvRV (sv));
65	}
66
67	static void
68	shrink (SV *sv)	84	shrink (SV *sv)
69	{	85	{
70	sv_utf8_downgrade (sv, 1);	86	sv_utf8_downgrade (sv, 1);
71	if (SvLEN (sv) > SvCUR (sv) + 1)	87	if (SvLEN (sv) > SvCUR (sv) + 1)
72	{	88	{
…		…
107	typedef struct	123	typedef struct
108	{	124	{
109	char *cur; // SvPVX (sv) + current output position	125	char *cur; // SvPVX (sv) + current output position
110	char *end; // SvEND (sv)	126	char *end; // SvEND (sv)
111	SV *sv; // result scalar	127	SV *sv; // result scalar
112	U32 flags; // F_*	128	JSON json;
113	U32 indent; // indentation level	129	U32 indent; // indentation level
114	U32 maxdepth; // max. indentation/recursion level	130	U32 maxdepth; // max. indentation/recursion level
115	} enc_t;	131	} enc_t;
116		132
117	inline void	133	inline void
…		…
178	STRLEN clen;	194	STRLEN clen;
179	UV uch;	195	UV uch;
180		196
181	if (is_utf8)	197	if (is_utf8)
182	{	198	{
183	//uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY);
184	uch = decode_utf8 (str, end - str, &clen);	199	uch = decode_utf8 (str, end - str, &clen);
185	if (clen == (STRLEN)-1)	200	if (clen == (STRLEN)-1)
186	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);	201	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);
187	}	202	}
188	else	203	else
…		…
192	}	207	}
193		208
194	if (uch > 0x10FFFFUL)	209	if (uch > 0x10FFFFUL)
195	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);	210	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
196		211
197	if (uch < 0x80 \|\| enc->flags & F_ASCII \|\| (enc->flags & F_LATIN1 && uch > 0xFF))	212	if (uch < 0x80 \|\| enc->json.flags & F_ASCII \|\| (enc->json.flags & F_LATIN1 && uch > 0xFF))
198	{	213	{
199	if (uch > 0xFFFFUL)	214	if (uch > 0xFFFFUL)
200	{	215	{
201	need (enc, len += 11);	216	need (enc, len += 11);
202	sprintf (enc->cur, "\\u%04x\\u%04x",	217	sprintf (enc->cur, "\\u%04x\\u%04x",
…		…
216	*enc->cur++ = hexdigit [(uch >> 0) & 15];	231	*enc->cur++ = hexdigit [(uch >> 0) & 15];
217	}	232	}
218		233
219	str += clen;	234	str += clen;
220	}	235	}
221	else if (enc->flags & F_LATIN1)	236	else if (enc->json.flags & F_LATIN1)
222	{	237	{
223	*enc->cur++ = uch;	238	*enc->cur++ = uch;
224	str += clen;	239	str += clen;
225	}	240	}
226	else if (is_utf8)	241	else if (is_utf8)
…		…
247	}	262	}
248		263
249	inline void	264	inline void
250	encode_indent (enc_t *enc)	265	encode_indent (enc_t *enc)
251	{	266	{
252	if (enc->flags & F_INDENT)	267	if (enc->json.flags & F_INDENT)
253	{	268	{
254	int spaces = enc->indent * INDENT_STEP;	269	int spaces = enc->indent * INDENT_STEP;
255		270
256	need (enc, spaces);	271	need (enc, spaces);
257	memset (enc->cur, ' ', spaces);	272	memset (enc->cur, ' ', spaces);
…		…
267	}	282	}
268		283
269	inline void	284	inline void
270	encode_nl (enc_t *enc)	285	encode_nl (enc_t *enc)
271	{	286	{
272	if (enc->flags & F_INDENT)	287	if (enc->json.flags & F_INDENT)
273	{	288	{
274	need (enc, 1);	289	need (enc, 1);
275	encode_ch (enc, '\n');	290	encode_ch (enc, '\n');
276	}	291	}
277	}	292	}
…		…
279	inline void	294	inline void
280	encode_comma (enc_t *enc)	295	encode_comma (enc_t *enc)
281	{	296	{
282	encode_ch (enc, ',');	297	encode_ch (enc, ',');
283		298
284	if (enc->flags & F_INDENT)	299	if (enc->json.flags & F_INDENT)
285	encode_nl (enc);	300	encode_nl (enc);
286	else if (enc->flags & F_SPACE_AFTER)	301	else if (enc->json.flags & F_SPACE_AFTER)
287	encode_space (enc);	302	encode_space (enc);
288	}	303	}
289		304
290	static void encode_sv (enc_t enc, SV sv);	305	static void encode_sv (enc_t enc, SV sv);
291		306
…		…
300	encode_ch (enc, '['); encode_nl (enc);	315	encode_ch (enc, '['); encode_nl (enc);
301	++enc->indent;	316	++enc->indent;
302		317
303	for (i = 0; i <= len; ++i)	318	for (i = 0; i <= len; ++i)
304	{	319	{
		320	SV **svp = av_fetch (av, i, 0);
		321
305	encode_indent (enc);	322	encode_indent (enc);
306	encode_sv (enc, *av_fetch (av, i, 0));	323
		324	if (svp)
		325	encode_sv (enc, *svp);
		326	else
		327	encode_str (enc, "null", 4, 0);
307		328
308	if (i < len)	329	if (i < len)
309	encode_comma (enc);	330	encode_comma (enc);
310	}	331	}
311		332
…		…
334	else	355	else
335	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));	356	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));
336		357
337	encode_ch (enc, '"');	358	encode_ch (enc, '"');
338		359
339	if (enc->flags & F_SPACE_BEFORE) encode_space (enc);	360	if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);
340	encode_ch (enc, ':');	361	encode_ch (enc, ':');
341	if (enc->flags & F_SPACE_AFTER ) encode_space (enc);	362	if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);
342	encode_sv (enc, HeVAL (he));	363	encode_sv (enc, HeVAL (he));
343	}	364	}
344		365
345	// compare hash entries, used when all keys are bytestrings	366	// compare hash entries, used when all keys are bytestrings
346	static int	367	static int
…		…
381	{	402	{
382	// for canonical output we have to sort by keys first	403	// for canonical output we have to sort by keys first
383	// actually, this is mostly due to the stupid so-called	404	// actually, this is mostly due to the stupid so-called
384	// security workaround added somewhere in 5.8.x.	405	// security workaround added somewhere in 5.8.x.
385	// that randomises hash orderings	406	// that randomises hash orderings
386	if (enc->flags & F_CANONICAL)	407	if (enc->json.flags & F_CANONICAL)
387	{	408	{
388	int fast = 1;	409	int fast = 1;
389	HE *he;	410	HE *he;
390	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)	411	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)
391	HE *hes = _alloca (count sizeof (HE));	412	HE *hes = _alloca (count sizeof (HE));
…		…
463	svtype svt;	484	svtype svt;
464		485
465	SvGETMAGIC (sv);	486	SvGETMAGIC (sv);
466	svt = SvTYPE (sv);	487	svt = SvTYPE (sv);
467		488
		489	if (expect_false (SvOBJECT (sv)))
		490	{
		491	HV *stash = !JSON_SLOW \|\| json_boolean_stash
		492	? json_boolean_stash
		493	: gv_stashpv ("JSON::XS::Boolean", 1);
		494
		495	if (SvSTASH (sv) == stash)
		496	{
		497	if (SvIV (sv))
		498	encode_str (enc, "true", 4, 0);
		499	else
		500	encode_str (enc, "false", 5, 0);
		501	}
		502	else
		503	{
		504	#if 0
		505	if (0 && sv_derived_from (rv, "JSON::Literal"))
		506	{
		507	// not yet
		508	}
		509	#endif
		510	if (enc->json.flags & F_CONV_BLESSED)
		511	{
		512	// we re-bless the reference to get overload and other niceties right
		513	GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 0);
		514
		515	if (to_json)
		516	{
		517	dSP;
		518
		519	ENTER; SAVETMPS; PUSHMARK (SP);
		520	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
		521
		522	// calling with G_SCALAR ensures that we always get a 1 return value
		523	PUTBACK;
		524	call_sv ((SV *)GvCV (to_json), G_SCALAR);
		525	SPAGAIN;
		526
		527	// catch this surprisingly common error
		528	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		529	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		530
		531	sv = POPs;
		532	PUTBACK;
		533
		534	encode_sv (enc, sv);
		535
		536	FREETMPS; LEAVE;
		537	}
		538	else if (enc->json.flags & F_ALLOW_BLESSED)
		539	encode_str (enc, "null", 4, 0);
		540	else
		541	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
		542	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		543	}
		544	else if (enc->json.flags & F_ALLOW_BLESSED)
		545	encode_str (enc, "null", 4, 0);
		546	else
		547	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",
		548	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		549	}
		550	}
468	if (svt == SVt_PVHV)	551	else if (svt == SVt_PVHV)
469	encode_hv (enc, (HV *)sv);	552	encode_hv (enc, (HV *)sv);
470	else if (svt == SVt_PVAV)	553	else if (svt == SVt_PVAV)
471	encode_av (enc, (AV *)sv);	554	encode_av (enc, (AV *)sv);
472	else if (svt < SVt_PVAV)	555	else if (svt < SVt_PVAV)
473	{	556	{
474	if (SvNIOK (sv) && SvIV (sv) == 0)	557	STRLEN len = 0;
		558	char *pv = svt ? SvPV (sv, len) : 0;
		559
		560	if (len == 1 && *pv == '1')
		561	encode_str (enc, "true", 4, 0);
		562	else if (len == 1 && *pv == '0')
475	encode_str (enc, "false", 5, 0);	563	encode_str (enc, "false", 5, 0);
476	else if (SvNIOK (sv) && SvIV (sv) == 1)
477	encode_str (enc, "true", 4, 0);
478	else	564	else
479	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",	565	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
480	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	566	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
481	}	567	}
482	else	568	else
…		…
552	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",	638	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",
553	SvPV_nolen (sv), SvFLAGS (sv));	639	SvPV_nolen (sv), SvFLAGS (sv));
554	}	640	}
555		641
556	static SV *	642	static SV *
557	encode_json (SV *scalar, U32 flags)	643	encode_json (SV scalar, JSON json)
558	{	644	{
559	enc_t enc;	645	enc_t enc;
560		646
561	if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar))	647	if (!(json->flags & F_ALLOW_NONREF) && !SvROK (scalar))
562	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");	648	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
563		649
564	enc.flags = flags;	650	enc.json = *json;
565	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	651	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
566	enc.cur = SvPVX (enc.sv);	652	enc.cur = SvPVX (enc.sv);
567	enc.end = SvEND (enc.sv);	653	enc.end = SvEND (enc.sv);
568	enc.indent = 0;	654	enc.indent = 0;
569	enc.maxdepth = DEC_DEPTH (flags);	655	enc.maxdepth = DEC_DEPTH (enc.json.flags);
570		656
571	SvPOK_only (enc.sv);	657	SvPOK_only (enc.sv);
572	encode_sv (&enc, scalar);	658	encode_sv (&enc, scalar);
573		659
574	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	660	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
575	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	661	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
576		662
577	if (!(flags & (F_ASCII \| F_LATIN1 \| F_UTF8)))	663	if (!(enc.json.flags & (F_ASCII \| F_LATIN1 \| F_UTF8)))
578	SvUTF8_on (enc.sv);	664	SvUTF8_on (enc.sv);
579		665
580	if (enc.flags & F_SHRINK)	666	if (enc.json.flags & F_SHRINK)
581	shrink (enc.sv);	667	shrink (enc.sv);
582		668
583	return enc.sv;	669	return enc.sv;
584	}	670	}
585		671
…		…
590	typedef struct	676	typedef struct
591	{	677	{
592	char *cur; // current parser pointer	678	char *cur; // current parser pointer
593	char *end; // end of input string	679	char *end; // end of input string
594	const char *err; // parse error, if != 0	680	const char *err; // parse error, if != 0
595	U32 flags; // F_*	681	JSON json;
596	U32 depth; // recursion depth	682	U32 depth; // recursion depth
597	U32 maxdepth; // recursion depth limit	683	U32 maxdepth; // recursion depth limit
598	} dec_t;	684	} dec_t;
599		685
600	inline void	686	inline void
…		…
631	decode_4hex (dec_t *dec)	717	decode_4hex (dec_t *dec)
632	{	718	{
633	signed char d1, d2, d3, d4;	719	signed char d1, d2, d3, d4;
634	unsigned char cur = (unsigned char )dec->cur;	720	unsigned char cur = (unsigned char )dec->cur;
635		721
636	d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("four hexadecimal digits expected");	722	d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("exactly four hexadecimal digits expected");
637	d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("four hexadecimal digits expected");	723	d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("exactly four hexadecimal digits expected");
638	d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("four hexadecimal digits expected");	724	d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("exactly four hexadecimal digits expected");
639	d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("four hexadecimal digits expected");	725	d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("exactly four hexadecimal digits expected");
640		726
641	dec->cur += 4;	727	dec->cur += 4;
642		728
643	return ((UV)d1) << 12	729	return ((UV)d1) << 12
644	\| ((UV)d2) << 8	730	\| ((UV)d2) << 8
…		…
863	is_nv = 1;	949	is_nv = 1;
864	}	950	}
865		951
866	if (!is_nv)	952	if (!is_nv)
867	{	953	{
		954	int len = dec->cur - start;
		955
868	// special case the rather common 1..4-digit-int case, assumes 32 bit ints or so	956	// special case the rather common 1..4-digit-int case, assumes 32 bit ints or so
869	if (*start == '-')	957	if (*start == '-')
870	switch (dec->cur - start)	958	switch (len)
871	{	959	{
872	case 2: return newSViv (-( start [1] - '0' ));	960	case 2: return newSViv (-( start [1] - '0' * 1));
873	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));	961	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));
874	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));	962	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
875	case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));	963	case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
876	}	964	}
877	else	965	else
878	switch (dec->cur - start)	966	switch (len)
879	{	967	{
880	case 1: return newSViv ( start [0] - '0' );	968	case 1: return newSViv ( start [0] - '0' * 1);
881	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);	969	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
882	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);	970	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
883	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);	971	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
884	}	972	}
885		973
886	{	974	{
887	UV uv;	975	UV uv;
888	int numtype = grok_number (start, dec->cur - start, &uv);	976	int numtype = grok_number (start, len, &uv);
889	if (numtype & IS_NUMBER_IN_UV)	977	if (numtype & IS_NUMBER_IN_UV)
890	if (numtype & IS_NUMBER_NEG)	978	if (numtype & IS_NUMBER_NEG)
891	{	979	{
892	if (uv < (UV)IV_MIN)	980	if (uv < (UV)IV_MIN)
893	return newSViv (-(IV)uv);	981	return newSViv (-(IV)uv);
894	}	982	}
895	else	983	else
896	return newSVuv (uv);	984	return newSVuv (uv);
897	}	985	}
898	}
899		986
		987	len -= *start == '-' ? 1 : 0;
		988
		989	// does not fit into IV or UV, try NV
		990	if ((sizeof (NV) == sizeof (double) && DBL_DIG >= len)
		991	#if defined (LDBL_DIG)
		992	\|\| (sizeof (NV) == sizeof (long double) && LDBL_DIG >= len)
		993	#endif
		994	)
		995	// fits into NV without loss of precision
		996	return newSVnv (Atof (start));
		997
		998	// everything else fails, convert it to a string
		999	return newSVpvn (start, dec->cur - start);
		1000	}
		1001
		1002	// loss of precision here
900	return newSVnv (Atof (start));	1003	return newSVnv (Atof (start));
901		1004
902	fail:	1005	fail:
903	return 0;	1006	return 0;
904	}	1007	}
…		…
948	}	1051	}
949		1052
950	static SV *	1053	static SV *
951	decode_hv (dec_t *dec)	1054	decode_hv (dec_t *dec)
952	{	1055	{
		1056	SV *sv;
953	HV *hv = newHV ();	1057	HV *hv = newHV ();
954		1058
955	DEC_INC_DEPTH;	1059	DEC_INC_DEPTH;
956	decode_ws (dec);	1060	decode_ws (dec);
957		1061
958	if (*dec->cur == '}')	1062	if (*dec->cur == '}')
959	++dec->cur;	1063	++dec->cur;
960	else	1064	else
961	for (;;)	1065	for (;;)
962	{	1066	{
963	SV key, value;
964
965	decode_ws (dec); EXPECT_CH ('"');	1067	decode_ws (dec); EXPECT_CH ('"');
966		1068
967	key = decode_str (dec);	1069	// heuristic: assume that
968	if (!key)	1070	// a) decode_str + hv_store_ent are abysmally slow.
969	goto fail;	1071	// b) most hash keys are short, simple ascii text.
		1072	// => try to "fast-match" such strings to avoid
		1073	// the overhead of decode_str + hv_store_ent.
		1074	{
		1075	SV *value;
		1076	char *p = dec->cur;
		1077	char *e = p + 24; // only try up to 24 bytes
970		1078
971	decode_ws (dec); EXPECT_CH (':');	1079	for (;;)
972
973	value = decode_sv (dec);
974	if (!value)
975	{	1080	{
		1081	// the >= 0x80 is true on most architectures
		1082	if (p == e \|\| p < 0x20 \|\| p >= 0x80 \|\| *p == '\\')
		1083	{
		1084	// slow path, back up and use decode_str
		1085	SV *key = decode_str (dec);
		1086	if (!key)
		1087	goto fail;
		1088
		1089	decode_ws (dec); EXPECT_CH (':');
		1090
		1091	value = decode_sv (dec);
		1092	if (!value)
		1093	{
		1094	SvREFCNT_dec (key);
		1095	goto fail;
		1096	}
		1097
		1098	hv_store_ent (hv, key, value, 0);
976	SvREFCNT_dec (key);	1099	SvREFCNT_dec (key);
		1100
		1101	break;
		1102	}
		1103	else if (*p == '"')
		1104	{
		1105	// fast path, got a simple key
		1106	char *key = dec->cur;
		1107	int len = p - key;
		1108	dec->cur = p + 1;
		1109
		1110	decode_ws (dec); EXPECT_CH (':');
		1111
		1112	value = decode_sv (dec);
		1113	if (!value)
977	goto fail;	1114	goto fail;
		1115
		1116	hv_store (hv, key, len, value, 0);
		1117
		1118	break;
		1119	}
		1120
		1121	++p;
978	}	1122	}
979		1123	}
980	hv_store_ent (hv, key, value, 0);
981	SvREFCNT_dec (key);
982		1124
983	decode_ws (dec);	1125	decode_ws (dec);
984		1126
985	if (*dec->cur == '}')	1127	if (*dec->cur == '}')
986	{	1128	{
…		…
993		1135
994	++dec->cur;	1136	++dec->cur;
995	}	1137	}
996		1138
997	DEC_DEC_DEPTH;	1139	DEC_DEC_DEPTH;
998	return newRV_noinc ((SV *)hv);	1140	sv = newRV_noinc ((SV *)hv);
		1141
		1142	// check filter callbacks
		1143	if (dec->json.flags & F_HOOK)
		1144	{
		1145	if (dec->json.cb_sk_object && HvKEYS (hv) == 1)
		1146	{
		1147	HE cb, he;
		1148
		1149	hv_iterinit (hv);
		1150	he = hv_iternext (hv);
		1151	hv_iterinit (hv);
		1152
		1153	// the next line creates a mortal sv each time its called.
		1154	// might want to optimise this for common cases.
		1155	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);
		1156
		1157	if (cb)
		1158	{
		1159	dSP;
		1160	int count;
		1161
		1162	ENTER; SAVETMPS; PUSHMARK (SP);
		1163	XPUSHs (HeVAL (he));
		1164
		1165	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
		1166
		1167	if (count == 1)
		1168	{
		1169	sv = newSVsv (POPs);
		1170	FREETMPS; LEAVE;
		1171	return sv;
		1172	}
		1173
		1174	FREETMPS; LEAVE;
		1175	}
		1176	}
		1177
		1178	if (dec->json.cb_object)
		1179	{
		1180	dSP;
		1181	int count;
		1182
		1183	ENTER; SAVETMPS; PUSHMARK (SP);
		1184	XPUSHs (sv_2mortal (sv));
		1185
		1186	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;
		1187
		1188	if (count == 1)
		1189	{
		1190	sv = newSVsv (POPs);
		1191	FREETMPS; LEAVE;
		1192	return sv;
		1193	}
		1194
		1195	SvREFCNT_inc (sv);
		1196	FREETMPS; LEAVE;
		1197	}
		1198	}
		1199
		1200	return sv;
999		1201
1000	fail:	1202	fail:
1001	SvREFCNT_dec (hv);	1203	SvREFCNT_dec (hv);
1002	DEC_DEC_DEPTH;	1204	DEC_DEC_DEPTH;
1003	return 0;	1205	return 0;
…		…
1005		1207
1006	static SV *	1208	static SV *
1007	decode_sv (dec_t *dec)	1209	decode_sv (dec_t *dec)
1008	{	1210	{
1009	decode_ws (dec);	1211	decode_ws (dec);
		1212
		1213	// the beauty of JSON: you need exactly one character lookahead
		1214	// to parse anything.
1010	switch (*dec->cur)	1215	switch (*dec->cur)
1011	{	1216	{
1012	case '"': ++dec->cur; return decode_str (dec);	1217	case '"': ++dec->cur; return decode_str (dec);
1013	case '[': ++dec->cur; return decode_av (dec);	1218	case '[': ++dec->cur; return decode_av (dec);
1014	case '{': ++dec->cur; return decode_hv (dec);	1219	case '{': ++dec->cur; return decode_hv (dec);
…		…
1020		1225
1021	case 't':	1226	case 't':
1022	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1227	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
1023	{	1228	{
1024	dec->cur += 4;	1229	dec->cur += 4;
1025	return newSViv (1);	1230	return SvREFCNT_inc (json_true);
1026	}	1231	}
1027	else	1232	else
1028	ERR ("'true' expected");	1233	ERR ("'true' expected");
1029		1234
1030	break;	1235	break;
1031		1236
1032	case 'f':	1237	case 'f':
1033	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))	1238	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
1034	{	1239	{
1035	dec->cur += 5;	1240	dec->cur += 5;
1036	return newSViv (0);	1241	return SvREFCNT_inc (json_false);
1037	}	1242	}
1038	else	1243	else
1039	ERR ("'false' expected");	1244	ERR ("'false' expected");
1040		1245
1041	break;	1246	break;
…		…
1059	fail:	1264	fail:
1060	return 0;	1265	return 0;
1061	}	1266	}
1062		1267
1063	static SV *	1268	static SV *
1064	decode_json (SV string, U32 flags, UV offset_return)	1269	decode_json (SV string, JSON json, UV *offset_return)
1065	{	1270	{
1066	dec_t dec;	1271	dec_t dec;
1067	UV offset;	1272	UV offset;
1068	SV *sv;	1273	SV *sv;
1069		1274
1070	SvGETMAGIC (string);	1275	SvGETMAGIC (string);
1071	SvUPGRADE (string, SVt_PV);	1276	SvUPGRADE (string, SVt_PV);
1072		1277
		1278	if (json->flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (json->flags))
		1279	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		1280	(unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (json->flags));
		1281
1073	if (flags & F_UTF8)	1282	if (json->flags & F_UTF8)
1074	sv_utf8_downgrade (string, 0);	1283	sv_utf8_downgrade (string, 0);
1075	else	1284	else
1076	sv_utf8_upgrade (string);	1285	sv_utf8_upgrade (string);
1077		1286
1078	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1287	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
1079		1288
1080	dec.flags = flags;	1289	dec.json = *json;
1081	dec.cur = SvPVX (string);	1290	dec.cur = SvPVX (string);
1082	dec.end = SvEND (string);	1291	dec.end = SvEND (string);
1083	dec.err = 0;	1292	dec.err = 0;
1084	dec.depth = 0;	1293	dec.depth = 0;
1085	dec.maxdepth = DEC_DEPTH (dec.flags);	1294	dec.maxdepth = DEC_DEPTH (dec.json.flags);
		1295
		1296	if (dec.json.cb_object \|\| dec.json.cb_sk_object)
		1297	dec.json.flags \|= F_HOOK;
1086		1298
1087	*dec.end = 0; // this should basically be a nop, too, but make sure it's there	1299	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
1088	sv = decode_sv (&dec);	1300	sv = decode_sv (&dec);
1089		1301
1090	if (!(offset_return \|\| !sv))	1302	if (!(offset_return \|\| !sv))
…		…
1100	}	1312	}
1101	}	1313	}
1102		1314
1103	if (offset_return \|\| !sv)	1315	if (offset_return \|\| !sv)
1104	{	1316	{
1105	offset = dec.flags & F_UTF8	1317	offset = dec.json.flags & F_UTF8
1106	? dec.cur - SvPVX (string)	1318	? dec.cur - SvPVX (string)
1107	: utf8_distance (dec.cur, SvPVX (string));	1319	: utf8_distance (dec.cur, SvPVX (string));
1108		1320
1109	if (offset_return)	1321	if (offset_return)
1110	*offset_return = offset;	1322	*offset_return = offset;
…		…
1129	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1341	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
1130	}	1342	}
1131		1343
1132	sv = sv_2mortal (sv);	1344	sv = sv_2mortal (sv);
1133		1345
1134	if (!(dec.flags & F_ALLOW_NONREF) && !SvROK (sv))	1346	if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))
1135	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");	1347	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
1136		1348
1137	return sv;	1349	return sv;
1138	}	1350	}
1139		1351
…		…
1143	MODULE = JSON::XS PACKAGE = JSON::XS	1355	MODULE = JSON::XS PACKAGE = JSON::XS
1144		1356
1145	BOOT:	1357	BOOT:
1146	{	1358	{
1147	int i;	1359	int i;
1148
1149	memset (decode_hexdigit, 0xff, 256);
1150		1360
1151	for (i = 0; i < 256; ++i)	1361	for (i = 0; i < 256; ++i)
1152	decode_hexdigit [i] =	1362	decode_hexdigit [i] =
1153	i >= '0' && i <= '9' ? i - '0'	1363	i >= '0' && i <= '9' ? i - '0'
1154	: i >= 'a' && i <= 'f' ? i - 'a' + 10	1364	: i >= 'a' && i <= 'f' ? i - 'a' + 10
1155	: i >= 'A' && i <= 'F' ? i - 'A' + 10	1365	: i >= 'A' && i <= 'F' ? i - 'A' + 10
1156	: -1;	1366	: -1;
1157		1367
1158	json_stash = gv_stashpv ("JSON::XS", 1);	1368	json_stash = gv_stashpv ("JSON::XS" , 1);
		1369	json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);
		1370
		1371	json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true );
		1372	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);
1159	}	1373	}
1160		1374
1161	PROTOTYPES: DISABLE	1375	PROTOTYPES: DISABLE
1162		1376
1163	SV new (char dummy)	1377	void CLONE (...)
1164	CODE:	1378	CODE:
1165	RETVAL = sv_bless (newRV_noinc (newSVuv (F_DEFAULT)), json_stash);	1379	json_stash = 0;
1166	OUTPUT:	1380	json_boolean_stash = 0;
1167	RETVAL
1168		1381
		1382	void new (char *klass)
		1383	PPCODE:
		1384	{
		1385	SV *pv = NEWSV (0, sizeof (JSON));
		1386	SvPOK_only (pv);
		1387	Zero (SvPVX (pv), 1, JSON);
		1388	((JSON *)SvPVX (pv))->flags = F_DEFAULT;
		1389	XPUSHs (sv_2mortal (sv_bless (newRV_noinc (pv), JSON_STASH)));
		1390	}
		1391
1169	SV ascii (SV self, int enable = 1)	1392	void ascii (JSON *self, int enable = 1)
1170	ALIAS:	1393	ALIAS:
1171	ascii = F_ASCII	1394	ascii = F_ASCII
1172	latin1 = F_LATIN1	1395	latin1 = F_LATIN1
1173	utf8 = F_UTF8	1396	utf8 = F_UTF8
1174	indent = F_INDENT	1397	indent = F_INDENT
1175	canonical = F_CANONICAL	1398	canonical = F_CANONICAL
1176	space_before = F_SPACE_BEFORE	1399	space_before = F_SPACE_BEFORE
1177	space_after = F_SPACE_AFTER	1400	space_after = F_SPACE_AFTER
1178	pretty = F_PRETTY	1401	pretty = F_PRETTY
1179	allow_nonref = F_ALLOW_NONREF	1402	allow_nonref = F_ALLOW_NONREF
1180	shrink = F_SHRINK	1403	shrink = F_SHRINK
		1404	allow_blessed = F_ALLOW_BLESSED
		1405	convert_blessed = F_CONV_BLESSED
1181	CODE:	1406	PPCODE:
1182	{	1407	{
1183	UV *uv = SvJSON (self);
1184	if (enable)	1408	if (enable)
1185	*uv \|= ix;	1409	self->flags \|= ix;
1186	else	1410	else
1187	*uv &= ~ix;	1411	self->flags &= ~ix;
1188		1412
1189	RETVAL = newSVsv (self);	1413	XPUSHs (ST (0));
1190	}	1414	}
1191	OUTPUT:
1192	RETVAL
1193		1415
1194	SV max_depth (SV self, UV max_depth = 0x80000000UL)	1416	void max_depth (JSON *self, UV max_depth = 0x80000000UL)
1195	CODE:	1417	PPCODE:
1196	{	1418	{
1197	UV *uv = SvJSON (self);
1198	UV log2 = 0;	1419	UV log2 = 0;
1199		1420
1200	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;	1421	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;
1201		1422
1202	while ((1UL << log2) < max_depth)	1423	while ((1UL << log2) < max_depth)
1203	++log2;	1424	++log2;
1204		1425
1205	uv = uv & ~F_MAXDEPTH \| (log2 << S_MAXDEPTH);	1426	self->flags = self->flags & ~F_MAXDEPTH \| (log2 << S_MAXDEPTH);
1206		1427
1207	RETVAL = newSVsv (self);	1428	XPUSHs (ST (0));
1208	}	1429	}
1209	OUTPUT:
1210	RETVAL
1211		1430
1212	void encode (SV self, SV scalar)	1431	void max_size (JSON *self, UV max_size = 0)
1213	PPCODE:	1432	PPCODE:
1214	XPUSHs (encode_json (scalar, *SvJSON (self)));	1433	{
		1434	UV log2 = 0;
1215		1435
1216	void decode (SV self, SV jsonstr)	1436	if (max_size > 0x80000000UL) max_size = 0x80000000UL;
		1437	if (max_size == 1) max_size = 2;
		1438
		1439	while ((1UL << log2) < max_size)
		1440	++log2;
		1441
		1442	self->flags = self->flags & ~F_MAXSIZE \| (log2 << S_MAXSIZE);
		1443
		1444	XPUSHs (ST (0));
		1445	}
		1446
		1447	void filter_json_object (JSON self, SV cb = &PL_sv_undef)
1217	PPCODE:	1448	PPCODE:
		1449	{
		1450	SvREFCNT_dec (self->cb_object);
		1451	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;
		1452
		1453	XPUSHs (ST (0));
		1454	}
		1455
		1456	void filter_json_single_key_object (JSON self, SV key, SV *cb = &PL_sv_undef)
		1457	PPCODE:
		1458	{
		1459	if (!self->cb_sk_object)
		1460	self->cb_sk_object = newHV ();
		1461
		1462	if (SvOK (cb))
		1463	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
		1464	else
		1465	{
		1466	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
		1467
		1468	if (!HvKEYS (self->cb_sk_object))
		1469	{
		1470	SvREFCNT_dec (self->cb_sk_object);
		1471	self->cb_sk_object = 0;
		1472	}
		1473	}
		1474
		1475	XPUSHs (ST (0));
		1476	}
		1477
		1478	void encode (JSON self, SV scalar)
		1479	PPCODE:
		1480	XPUSHs (encode_json (scalar, self));
		1481
		1482	void decode (JSON self, SV jsonstr)
		1483	PPCODE:
1218	XPUSHs (decode_json (jsonstr, *SvJSON (self), 0));	1484	XPUSHs (decode_json (jsonstr, self, 0));
1219		1485
1220	void decode_prefix (SV self, SV jsonstr)	1486	void decode_prefix (JSON self, SV jsonstr)
1221	PPCODE:	1487	PPCODE:
1222	{	1488	{
1223	UV offset;	1489	UV offset;
1224	EXTEND (SP, 2);	1490	EXTEND (SP, 2);
1225	PUSHs (decode_json (jsonstr, *SvJSON (self), &offset));	1491	PUSHs (decode_json (jsonstr, self, &offset));
1226	PUSHs (sv_2mortal (newSVuv (offset)));	1492	PUSHs (sv_2mortal (newSVuv (offset)));
1227	}	1493	}
1228		1494
		1495	void DESTROY (JSON *self)
		1496	CODE:
		1497	SvREFCNT_dec (self->cb_sk_object);
		1498	SvREFCNT_dec (self->cb_object);
		1499
1229	PROTOTYPES: ENABLE	1500	PROTOTYPES: ENABLE
1230		1501
1231	void to_json (SV *scalar)	1502	void to_json (SV *scalar)
1232	ALIAS:
1233	objToJson = 0
1234	PPCODE:	1503	PPCODE:
		1504	{
		1505	JSON json = { F_DEFAULT \| F_UTF8 };
1235	XPUSHs (encode_json (scalar, F_DEFAULT \| F_UTF8));	1506	XPUSHs (encode_json (scalar, &json));
		1507	}
1236		1508
1237	void from_json (SV *jsonstr)	1509	void from_json (SV *jsonstr)
1238	ALIAS:
1239	jsonToObj = 0
1240	PPCODE:	1510	PPCODE:
		1511	{
		1512	JSON json = { F_DEFAULT \| F_UTF8 };
1241	XPUSHs (decode_json (jsonstr, F_DEFAULT \| F_UTF8, 0));	1513	XPUSHs (decode_json (jsonstr, &json, 0));
		1514	}
1242		1515

Diff Legend

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+Removed lines
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+Added lines
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+Changed lines
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+Changed lines

Comparing JSON-XS/XS.xs (file contents): Revision 1.39 by root, Mon Jun 11 03:42:57 2007 UTC vs. Revision 1.59 by root, Mon Aug 13 16:14:20 2007 UTC

Diff Legend

Comparing JSON-XS/XS.xs (file contents):
Revision 1.39 by root, Mon Jun 11 03:42:57 2007 UTC vs.
Revision 1.59 by root, Mon Aug 13 16:14:20 2007 UTC